When using significant digits, the product has only the number of significant digits as the lowest number in the factors. "20" has two significant digits and "310" has three. Therefore, the product has to have two significant digits.
310 × 20 = 6200
6200 already has two significant digits.
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The two.
Two. The decimal indicates that the zero is significant otherwise it wouldn't be a significant digit.
62 is 20 percent of 310.
Potassium has a gram atomic mass of 39.1, to three significant digits (one more significant digit than "20 meq" has). Therefore, one meq = 39.1 mg, and 20 meq = 20(39.1) = 7.8 X 102 mg, to the justified number of significant digits.
20 times 17 is equal to 340. This can be calculated by multiplying 20 by 17 using the standard multiplication algorithm, which involves multiplying the units digits (0 and 7) to get 0, then multiplying the tens digits (2 and 1) to get 2, and finally adding a zero placeholder to the right to account for the tens place. Therefore, 20 times 17 equals 340.